Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 400 · 40 questions

Robot tip (Find the topic, use the formula): Find the topic: moving, motors, gears, wheels, sensors, echo, line or gyro. Use the rule: teeth × turns; circumference × turns; 17 cm per ms of echo; below the threshold = black; right adds degrees. Check: put your answer back into the rule.

1. 1.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 270°. It turns right 180°, then left 60°, then left 90°. What does the gyro read now (0° to 359°)?
2. 2.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
3. 3.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
4. 4.Which of these suits tracks? (a) crossing stepping-stones (b) hovering over a roof (c) a long factory floor (d) soft snow
5. 5.⚙️ A motor makes 120 turns a minute with a 15-tooth gear on it. That gear drives a 45-tooth gear. How many turns a minute does the 45-tooth gear make?
6. 6.True or false: “a field of tall boulders” suits legs. (a) False (b) True
7. 7.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) they do not turn (c) the same direction (d) in opposite directions
8. 8.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) goes straight forward (b) spins left on the spot (c) spins right on the spot (d) stays still
9. 9.🧭 A robot should turn right 90°, but its gyro shows it turned 97°. How many degrees must it turn back to the left?
10. 10.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
11. 11.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
12. 12.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
13. 13.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
14. 14.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a light sensor (c) a servo motor (d) a buzzer
15. 15.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
16. 16.🔍 Which sensor helps a robot measure how far a box is? (a) a touch sensor (b) a light sensor (c) a sound sensor (d) a distance sensor
17. 17.Which of these suits wheels? (a) hovering over a roof (b) deep mud (c) a hospital corridor (d) crossing stepping-stones
18. 18.📡 An object is 51 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
19. 19.🛞 Which way of moving suits this best: “flying over a field”? (a) wheels (b) propellers (c) legs (d) tracks
20. 20.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
21. 21.🧭 A robot should turn right 45°, but its gyro shows it turned 38°. How many degrees must it turn more to the right?
22. 22.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 180°. It turns right 45°, then left 90°, then left 180°. What does the gyro read now (0° to 359°)?
23. 23.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) spins left on the spot (b) goes straight forward (c) goes straight back (d) stays still
24. 24.⚙️ A 20-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
25. 25.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 270°. It turns left 180°, then left 135°. What does the gyro read now (0° to 359°)?
26. 26.🦾 A servo moves from 100° to 20°. How many degrees does it turn?
27. 27.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
28. 28.📡 An object is 85 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
29. 29.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 90. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) neither sensor (d) the right sensor
30. 30.Which of these suits legs? (a) crossing stepping-stones (b) loose sand dunes (c) moving under water (d) a muddy building site
31. 31.⬛ The threshold of a light sensor is … (a) the black/white cut-off (b) the battery size (c) the top speed (d) the wheel size
32. 32.📡 A robot is 300 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 10 seconds (in cm)?
33. 33.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
34. 34.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) faster but weaker (d) not at all
35. 35.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 20. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) both sensors (d) the right sensor
36. 36.📡 Which object is hardest for an echo sensor to notice? (a) a metal door (b) a soft foam cushion (c) a wooden box (d) a flat wall
37. 37.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 8 times (in cm)?
38. 38.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
39. 39.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 18° (c) 10° (d) 180°
40. 40.True or false: to find the brightest spot, use a temperature sensor. (a) False (b) True

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